Microchip Technology 24FC04T-I/MS

Overview

24FC04T-I/MS from Microchip Technology Inc. is a 4-Kbit I²C-compatible serial EEPROM organized as two 256 × 8-bit blocks, supporting 1 MHz clock frequency at 1.7–5.5 V supply, with hardware write-protection, 16-byte page write buffer, and industrial temperature range (–40°C to +85°C). It enables nonvolatile data storage in space-constrained embedded systems requiring low-power, noise-immune I²C communication.

For engineers reviewing the 24FC04T-I/MS datasheet, 24FC04T-I/MS pinout, 24FC04T-I/MS application, or 24FC04T-I/MS equivalent, this page delivers verified electrical specs, package-confirmed pin functions, real-world use cases, and validated alternative parts for design-in and BOM optimization.

Technical Context

The 24FC04T-I/MS implements a two-wire I²C interface with Schmitt-trigger inputs and slope-controlled outputs to suppress ground bounce and bus noise. Its internal address pointer supports current-address, random, and sequential read modes, while the 16-byte page buffer enables efficient multi-byte writes without host-side timing constraints.

It uses an on-chip high-voltage generator for EEPROM programming and features self-timed erase/write cycles with automatic completion detection via ACK polling. The WP pin provides hardware-level write protection for the full 4-Kbit array (addresses 000h–1FFh), independent of software control.

Key Specifications

Pinout & Package

24FC04T-I/MS is supplied in an 8-lead MSOP (Micro Small Outline Package) with 0.65 mm pitch, 3.0 mm × 3.0 mm body, and wettable flanks for automated optical inspection (AOI). Pin 1 is marked by a beveled corner.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar serial EEPROM applications.

Compared with 24AA04T-I/MS and 24LC04B-I/MS, the 24FC04T-I/MS uniquely delivers 1 MHz I²C performance at 1.7 V, making it optimal for battery-powered, space-constrained designs demanding both low-voltage compatibility and high-speed configuration updates.

Availability

24FC04T-I/MS is available at Aetrix Electronics and suitable for smart sensor calibration, industrial PLC configuration, and automotive body control module applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for 24FC04T-I/MS includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microchip Technology Inc. is a leading provider of microcontrollers, analog components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The 24FC04T-I/MS belongs to Microchip's 24XX04 family of serial EEPROMs, designed specifically for reliable, low-power, I²C-based nonvolatile storage in resource-constrained embedded systems across automotive, industrial, and medical markets.

FAQ

What is the maximum I²C clock frequency supported by the 24FC04T-I/MS?

The 24FC04T-I/MS supports up to 1 MHz I²C clock frequency across its full 1.7 V to 5.5 V supply range. This is confirmed in Table 1-2 of the DS20001708P datasheet, distinguishing it from the 24AA04 (max 400 kHz) and 24LC04B (max 400 kHz, requires ≥2.5 V for full speed). The 24FC04T-I/MS maintains 1 MHz operation even at 1.7 V, enabling faster configuration writes in low-voltage systems.

Does the 24FC04T-I/MS require external pull-up resistors on SDA and SCL lines?

Yes, the 24FC04T-I/MS requires external pull-up resistors on both SDA and SCL lines because it uses open-drain outputs. For 1 MHz operation, a 2 kΩ pull-up to VCC is recommended per the datasheet's AC characteristics table. Incorrect pull-up values cause timing violations or bus contention; values must be adjusted based on bus capacitance and VCC level.

How does hardware write-protection work on the 24FC04T-I/MS?

Hardware write-protection on the 24FC04T-I/MS is controlled by the WP pin: tying WP to VCC disables all write operations (including byte and page writes) to the full 4-Kbit memory array (000h–1FFh), while reads remain fully functional. Tying WP to VSS enables normal read/write access. This is a physical, non-volatile lock independent of software commands or power cycling.

What is the page write capability of the 24FC04T-I/MS?

The 24FC04T-I/MS features a 16-byte page write buffer, allowing up to 16 bytes to be loaded into the buffer and written to memory with a single Stop condition. Page writes must stay within a single 16-byte physical boundary (e.g., addresses 00h–0Fh); crossing boundaries causes wraparound. This reduces I²C transaction overhead compared to individual byte writes.

Is the 24FC04T-I/MS qualified for automotive applications?

Yes, the 24FC04T-I/MS is AEC-Q100 qualified (Grade 3: –40°C to +85°C), as stated in the Features section of DS20001708P. It meets stress testing requirements for automotive electronics, including thermal cycling, humidity bias, and ESD. The "I" in the part number denotes Industrial temperature grade, which aligns with AEC-Q100 Grade 3 specifications.